@incollection{JEDP_1995____A2_0,
     author = {Grieser, Daniel and Jerison, David},
     title = {Asymptotics of the first nodal line},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {2},
     pages = {1--8},
     publisher = {Ecole polytechnique},
     year = {1995},
     mrnumber = {96k:35037},
     zbl = {0872.35006},
     language = {en},
     url = {http://www.numdam.org/item/JEDP_1995____A2_0/}
}